Sibley Threshold Days by Year (USC00137664)

20 fixed thresholds counted per year at Sibley (USC00137664): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sibley Thresholds

Sibley: nights with a minimum temperature at or below 0 C (32 F) in 112 years, most in 1917 with 203.
Sibley: nights with a minimum temperature at or below -10 C (14 F) in 112 years, most in 1950 with 98.
Sibley: nights with a minimum temperature at or below -20 C (-4 F) in 112 years, most in 1996 with 45.
Sibley: days with a maximum temperature at or above 30 C (86 F) in 111 years, most in 1894 with 72.
20 fixed thresholds have at least one qualifying day at Sibley.

Days at or above 30 C (86 F)

111 years with a qualifying day

Days per year at Sibley with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 72 in 1894.

Days at or above 30 C (86 F) per year at Sibley
Year	Days	Decade average
1894	72	47.4
1896	33	47.4
1897	54	47.4
1898	41	47.4
1899	37	47.4
1900	58	31.9
1901	68	31.9
1902	29	31.9
1903	13	31.9
1904	13	31.9
1905	23	31.9
1906	29	31.9
1907	24	31.9
1908	34	31.9
1909	28	31.9
1910	37	33.9
1911	47	33.9
1912	25	33.9
1913	58	33.9
1914	42	33.9
1915	7	33.9
1917	25	33.9
1918	30	33.9
1936	70	58
1937	52	58
1938	52	58
1939	58	58
1940	50	41.7
1941	53	41.7
1942	29	41.7
1943	40	41.7
1944	32	41.7
1945	29	41.7
1946	37	41.7
1947	58	41.7
1948	47	41.7
1949	42	41.7
1950	17	40
1951	8	40
1952	41	40
1953	45	40
1954	35	40
1955	63	40
1956	48	40
1957	31	40
1958	52	40
1959	60	40
1960	39	36.4
1961	32	36.4
1962	23	36.4
1963	42	36.4
1964	52	36.4
1965	30	36.4
1966	46	36.4
1967	26	36.4
1968	43	36.4
1969	31	36.4
1970	69	41.6
1971	43	41.6
1972	32	41.6
1973	46	41.6
1974	42	41.6
1975	48	41.6
1976	51	41.6
1977	30	41.6
1978	25	41.6
1979	30	41.6
1980	56	33.1
1981	26	33.1
1982	19	33.1
1983	55	33.1
1984	24	33.1
1985	28	33.1
1986	11	33.1
1987	35	33.1
1988	49	33.1
1989	28	33.1
1990	26	18.3
1991	27	18.3
1992	5	18.3
1993	6	18.3
1994	14	18.3
1995	23	18.3
1996	12	18.3
1997	24	18.3
1998	20	18.3
1999	26	18.3
2000	23	22.3
2001	23	22.3
2002	40	22.3
2003	24	22.3
2004	7	22.3
2005	31	22.3
2008	8	22.3
2010	39	34.2
2011	42	34.2
2012	59	34.2
2013	45	34.2
2014	12	34.2
2015	19	34.2
2016	31	34.2
2017	37	34.2
2018	34	34.2
2019	24	34.2
2020	49	42
2021	45	42
2022	55	42
2023	50	42
2024	24	42
2025	32	42
2026	39	42

For each year, a bar from the first to the last day at Sibley meeting 30 C (86 F).

First to last qualifying date each year at Sibley
Year	First date	Last date
1894	1894-05-12	1894-09-28
1896	1896-05-05	1896-08-28
1897	1897-05-05	1897-10-04
1898	1898-04-15	1898-09-28
1899	1899-05-11	1899-10-12
1900	1900-05-11	1900-10-03
1901	1901-04-26	1901-09-06
1902	1902-05-17	1902-09-07
1903	1903-06-30	1903-08-25
1904	1904-05-23	1904-09-18
1905	1905-06-04	1905-10-05
1906	1906-04-25	1906-09-11
1907	1907-05-13	1907-09-19
1908	1908-04-14	1908-09-23
1909	1909-05-06	1909-08-28
1910	1910-04-28	1910-10-17
1911	1911-05-10	1911-09-17
1912	1912-06-26	1912-10-06
1913	1913-05-28	1913-10-04
1914	1914-05-26	1914-08-31
1915	1915-05-12	1915-08-17
1917	1917-05-18	1917-08-26
1918	1918-05-03	1918-09-01
1936	1936-05-05	1936-09-22
1937	1937-06-19	1937-09-22
1938	1938-06-21	1938-10-04
1939	1939-05-04	1939-09-22
1940	1940-05-12	1940-09-22
1941	1941-05-14	1941-09-20
1942	1942-05-29	1942-10-07
1943	1943-05-28	1943-08-31
1944	1944-05-14	1944-09-17
1945	1945-06-13	1945-09-08
1946	1946-06-06	1946-09-05
1947	1947-06-26	1947-10-21
1948	1948-05-19	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-05-23	1950-08-23
1951	1951-07-20	1951-08-30
1952	1952-05-03	1952-09-30
1953	1953-05-25	1953-10-03
1954	1954-04-14	1954-08-24
1955	1955-05-06	1955-09-18
1956	1956-05-21	1956-10-12
1957	1957-06-04	1957-09-01
1958	1958-05-10	1958-10-16
1959	1959-05-01	1959-09-09
1960	1960-04-22	1960-09-08
1961	1961-06-09	1961-09-09
1962	1962-04-25	1962-08-28
1963	1963-05-07	1963-10-06
1964	1964-04-16	1964-09-10
1965	1965-05-02	1965-08-17
1966	1966-05-22	1966-08-31
1967	1967-05-18	1967-10-03
1968	1968-06-03	1968-08-24
1969	1969-05-26	1969-08-30
1970	1970-04-28	1970-09-20
1971	1971-05-14	1971-09-08
1972	1972-05-17	1972-09-20
1973	1973-05-21	1973-08-30
1974	1974-06-03	1974-09-27
1975	1975-05-19	1975-10-13
1976	1976-05-19	1976-09-30
1977	1977-04-09	1977-09-08
1978	1978-05-25	1978-09-11
1979	1979-05-17	1979-09-04
1980	1980-04-20	1980-09-09
1981	1981-04-27	1981-09-29
1982	1982-05-30	1982-08-20
1983	1983-05-28	1983-09-28
1984	1984-06-26	1984-09-20
1985	1985-04-18	1985-09-08
1986	1986-06-19	1986-08-26
1987	1987-04-20	1987-08-16
1988	1988-05-13	1988-09-18
1989	1989-05-30	1989-09-01
1990	1990-05-08	1990-09-27
1991	1991-04-07	1991-09-07
1992	1992-05-01	1992-10-03
1993	1993-06-23	1993-08-27
1994	1994-04-19	1994-09-15
1995	1995-06-15	1995-08-19
1996	1996-05-18	1996-08-07
1997	1997-05-18	1997-10-07
1998	1998-05-18	1998-09-20
1999	1999-05-29	1999-09-26
2000	2000-05-05	2000-09-18
2001	2001-05-10	2001-10-03
2002	2002-04-16	2002-09-09
2003	2003-06-17	2003-10-20
2004	2004-04-19	2004-09-20
2005	2005-06-07	2005-10-04
2008	2008-06-20	2008-08-04
2010	2010-05-23	2010-10-10
2011	2011-05-11	2011-10-06
2012	2012-04-02	2012-09-12
2013	2013-05-14	2013-09-28
2014	2014-05-08	2014-09-20
2015	2015-06-10	2015-09-17
2016	2016-05-07	2016-09-24
2017	2017-05-09	2017-09-25
2018	2018-05-24	2018-09-17
2019	2019-06-05	2019-10-01
2020	2020-05-02	2020-09-23
2021	2021-05-02	2021-09-29
2022	2022-05-12	2022-09-21
2023	2023-04-13	2023-10-03
2024	2024-05-18	2024-09-30
2025	2025-05-10	2025-10-05
2026	2026-03-22	2026-10-12

Every Fixed Threshold

Fixed thresholds at Sibley
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	111	72	1894	39
35 C (95 F): Days	82	35	1936	2
40 C (104 F): Days	3	5	1936	1
90 F (32.2 C): Days	106	56	1936	11
100 F (37.8 C): Days	18	17	1936	1
0 C (32 F): Ice days (max	111	109	1978	34
0 C (32 F): Frost days (min	112	203	1917	99
-10 C (14 F): Days with min	112	98	1950	36
-20 C (-4 F): Days with min	112	45	1996	12
-30 C (-22 F): Days with min	70	11	1936	3
-40 C (-40 F): Days with min	2	1	1899	1
20 C (68 F): Tropical nights (min	104	28	1955	18
25 C (77 F): Days with min	7	2	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	111	43	2019	25
25 mm (0.98 in): Days with 25 mm or more rain	111	17	2018	8
50 mm (1.97 in): Days with 50 mm or more rain	73	5	1938	3
100 mm (3.94 in): Days with 100 mm or more rain	10	2	2010	1
10 cm (3.9 in): Days with 10 cm or more snowfall	78	6	1936	2
25 cm (9.8 in): Days with 25 cm or more snowfall	9	2	1951	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

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Data for Sibley threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Sibley Threshold Days by Year (USC00137664)

Key Facts for Sibley Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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